Revert "remove MiWallpaper"

This reverts commit a291a15183217245a948caa195e5f30e05bb0842.

Change-Id: Ia4880566be101173f7908cbe9dd06e1b0ddf9faa
Add O2O

Change-Id: I46c49198b619b79ff7af76518f461246b57ef514